27419054581 has 2 divisors, whose sum is σ = 27419054582. Its totient is φ = 27419054580.

The previous prime is 27419054513. The next prime is 27419054591. The reversal of 27419054581 is 18545091472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27367084900 + 51969681 = 165430^2 + 7209^2 .

It is a cyclic number.

It is not a de Polignac number, because 27419054581 - 2¹¹ = 27419052533 is a prime.

It is a super-2 number, since 2×27419054581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27419054591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13709527290 + 13709527291.

It is an arithmetic number, because the mean of its divisors is an integer number (13709527291).

Almost surely, 2^27419054581 is an apocalyptic number.

It is an amenable number.

27419054581 is a deficient number, since it is larger than the sum of its proper divisors (1).

27419054581 is an equidigital number, since it uses as much as digits as its factorization.

27419054581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 27419054581 in words is "twenty-seven billion, four hundred nineteen million, fifty-four thousand, five hundred eighty-one".